Keg valve systems

 

Keg valve systems

There are 6 major commercial keg valve systems used by breweries across the world - A, D, G, M, S, U.

A Keg coupler is the key that fits the valve of the keg - called keg tapping. This opens the keg to pump in gas and push out beer into the beer line. Couplers are not universal as they need to fit the specific keg valve they are made for.

Hence it is important to know your keg spear system to tap your keg with the right coupler to enjoy your favourite beer.

In the USA, most breweries use the D system.

 

Homebrewers mostly use Ball lock or Pin lock kegs (aka Cornelius or Soda kegs). These kegs have separate gas and liquid line connections and use different fittings for tapping.

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